scholarly journals Answers to the invited commentaries on 'Venous return simplified with air-plethysmography, modelling and Sack Theory' by CR Lattimer, A Obermayer

2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Christopher Richard Lattimer ◽  
Alfred Obermayer
Keyword(s):  
Venous Return ◽  
Air Plethysmography

Pneumatic thigh compression reduces calf volume and augments the venous return

2014 ◽  
Vol 30 (5) ◽  
pp. 316-322 ◽  
Author(s):  
Christopher R Lattimer ◽  
Evi Kalodiki ◽  
Mustapha Azzam ◽  
George Geroulakos
Keyword(s):  
Venous Return ◽  
Cuff Pressure ◽  
Intermittent Pneumatic Compression ◽  
Reactive Hyperaemia ◽  
Volume Changes ◽  
Venous Outflow ◽  
Arterial Inflow ◽  
Venous Volume ◽  
Air Plethysmography ◽  
The Right

Objectives Reactive hyperaemia following thigh compression increases arterial inflow and venous outflow. The net effect can be measured by changes in calf volume quantified using air-plethysmography. The objective was to investigate the effect of thigh compression on venous return. Method The right legs of 19 consecutive volunteers (14 male), median age 31 (25–56) years, were studied in the supine position using air-plethysmography. The clinical, etiological, anatomical, pathophysiological (CEAP) class was C0. A thigh-cuff, 12 cm wide, was inflated in increments of 10 mmHg, from 0 to 80 mmHg. After each inflation step, the calf volume increased to a plateau and was recorded. At 80 mmHg, the thigh-cuff was deflated suddenly with the calf volume decreasing until baseline. Calf volume changes were recorded and stored for analysis. Results There was a stepwise increase in the venous volume of the calf with each incremental rise in thigh-cuff pressure up to 80 mmHg (p < .0005, Friedman). The median (interquartile range) increase in venous volume from 0 to 80 mmHg was 87 (65–113) mL (p < .0005, Wilcoxon). The volume change below the original baseline following thigh-cuff release was −16 (−12 to −25) mL (p < .0005, Wilcoxon). Conclusions Once optimised, intermittent pneumatic compression of the thigh may have a therapeutic role in augmenting the venous return and reducing leg swelling in patients.

Ultrastructural Changes of the Tissue Thromboplastin after Intravenous Injection in Rabbits

1978 ◽  
Vol 39 (01) ◽  
pp. 201-209 ◽  
Author(s):  
Hiroshi Hasegawa ◽  
Hiroshi Nagata ◽  
Makoto Murao
Keyword(s):  
Intravenous Injection ◽  
Vascular Endothelium ◽  
Model Experiment ◽  
Venous Return ◽  
Ultrastructural Changes ◽  
Membrane Structures ◽  
Tissue Thromboplastin ◽  
Short Time ◽  
Sheet Membrane

SummaryAttempts were made to demonstrate ultrastructural changes of the tissue thromboplastin after intravenous injection, as a model experiment on the pulmonary microthrombi formation induced by the tissue thromboplastin circulating from venous return.Concentrically arranged membrane structures of the injected thromboplastin disappeared in extremely short time after the injection of the thromboplastin in rabbits. The long sheet membrane of the injected thromboplastin was frequently seen as adhered to the vascular endothelium or to the surface of blood corpuscles. Furthermore, fibrin fibres were formed in contact with the long sheet membrane of the thromboplastin. Membrane structures were not found anywhere in the control rabbits.

Single-Patch Fold-Back Technique for Augmentation of the Superior Vena Cava in Sinus Venosus Atrial Septal Defect Associated with Partial Anomalous Pulmonary Venous Return

2015 ◽  
Vol 17 (6) ◽  
pp. 282
Author(s):  
Suguru Ohira ◽  
Kiyoshi Doi ◽  
Takeshi Nakamura ◽  
Hitoshi Yaku
Keyword(s):  
Atrial Septal Defect ◽  
Superior Vena Cava ◽  
Septal Defect ◽  
Venous Return ◽  
Superior Vena ◽  
Pulmonary Veins ◽  
Vena Cava ◽  
Sinus Venosus ◽  
Right Atrial ◽  
Anomalous Pulmonary Venous Return

Sinus venosus atrial septal defect (ASD) is usually associated with partial anomalous pulmonary venous return (PAPVR) of the right pulmonary veins to the superior vena cava (SVC), or to the SVC-right atrial junction. Standard procedure for repair of this defect is a patch roofing of the sinus venosus ASD and rerouting of pulmonary veins. However, the presence of SVC stenosis is a complication of this technique, and SVC augmentation is necessary in some cases. We present a simple technique for concomitant closure of sinus venosus ASD associated with PAPVR and augmentation of the SVC with a single autologous pericardial patch.

Transport: blood and circulation

2017 ◽  
Author(s):  
Derek Burton ◽  
Margaret Burton
Keyword(s):  
Carbon Dioxide ◽  
Blood Cells ◽  
Venous Return ◽  
White Blood Cells ◽  
Nutrient Transport ◽  
Blood System ◽  
Fluid Component ◽  
Nucleated Red Blood Cells ◽  
Ventral Aorta ◽  
Osmotic Effects

The blood system transports nutrients, oxygen, carbon dioxide and nitrogenous wastes; other functions include defence. Fish have a closed, single circulation in which blood is pumped by a contractile heart via a ventral aorta to the gills, then via the dorsal aorta to vessels supplying the tissues and organs, with a venous return to the heart. Large venous sinuses occur in elasmobranchs. Air-breathing fish have modifications of the circulation. Complex networks of narrow blood vessels can occur as red patches, retia, maximizing transfer of nutrients, oxygen or heat. Most fish have nucleated red blood cells (erythrocytes) with haemoglobin. The types of white blood cells (leucocytes) are similar to those of other vertebrates but there are thrombocytes rather than platelets. Nutrient transport is in the plasma, the fluid component of the blood, which may also carry antifreeze agents and molecules (e.g. urea in elasmobranchs) which counteract deleterious osmotic effects

scholarly journals Repair of total anomalous pulmonary venous return (TAPVR) with pulmonary artery (PA) Stenosis in adult

2015 ◽  
Vol 10 (S1) ◽  
Author(s):  
Fuad Z Abdullayev ◽  
Imadaddin M Bagirov ◽  
Nigar J Kazimzade ◽  
Larisa S Shikhiyeva
Keyword(s):  
Pulmonary Artery ◽  
Venous Return ◽  
Anomalous Pulmonary Venous Return

Venous Return

1957 ◽  
Vol 1 (9) ◽  
pp. 279-279
Keyword(s):  
Venous Return

scholarly journals Sports compression garments improve resting markers of venous return and muscle blood flow in male basketball players

2021 ◽  
Author(s):  
Shane F. O'Riordan ◽  
Rod McGregor ◽  
Shona L. Halson ◽  
David J. Bishop ◽  
James R. Broatch
Keyword(s):  
Blood Flow ◽  
Venous Return ◽  
Muscle Blood Flow ◽  
Basketball Players ◽  
Compression Garments
Sign in / Sign up

Export Citation Format

Share Document